The hot glob down into your boot into that little hole where the tongue meets the body of the boot at the ankle and the boots pucker out just a little when flexed. It takes so damn long to undo those laces.
Yeah, you just have to grit your teeth and ride it out. A big blob that falls right into the inside crook of your elbow (overhead welding) usually 'sticks' there (to your skin) and likewise creates a situation where you just have to ride it out. I have permanent scars from just such situations. When I have blood drawn....I always get funny looks or questions about past 'addictions' of which I have none.
You want to be sure the bottoms of blue-jeans are not tattered as well. You'll be welding along and suddenly feel a LOT of heat on your leg...only to find out you've set yourself on fire. And of course, hot BB's will burn right though a thin shirt if welding overhead or on your back (under a vehicle) just be aware.....it can happen.
Depending on where the spatter lands and your tolerance for pain...you can suck it up and keep welding or learn a new dance move.